摘要
超声波测距具有非接触、高准确度、价格低和使用方便等优点,被广泛应用于工业生产、医学检查、日常生活,如无人驾驶汽车、机器人、液位计等。在这些应用中,超声波传感器是应用中的最关键部件之一。因此,本文在分析了超声波传感器在谐振频率点等效电路的基础上,分别采用无源电感和有源电感对超声换能器的发射探头和接收探头进行电端匹配,提高了收发探头的效率。实验表明,匹配方法是有效的。
The technology of measuring distance by ultrasonic signal with advantages of non-contact, high accuracy, low cost, user-friendliress has been used widely in industries production, medical inspection, and daily life, such as AGV, robot, liquid level meter, and so on. In these applications, ultrasonic sensor is one of the major critical components. Based on analyzing the equivalent circuit of ultrasonic sensor at resonance frequency, the efficiency of ultrasonic transducers can be improved by the matching circuit using passive inductance or active inductance. Experimental results show that this proposed matching method is effective.
出处
《应用声学》
CSCD
北大核心
2009年第3期238-240,共3页
Journal of Applied Acoustics
基金
上海市重点学科建设资助项目(J51301)
关键词
超声波传感器
电端匹配
广义合成阻抗
测距
Ultrasonic sensor, Electric matching, General impedance converter, Distance measurement
作者简介
通信作者:张佳民(1970-),女,哈尔滨人,硕士,讲师,主要从事传感器与测试等方面的研究。E-mail:zjmxinxiang@126.com
杨宁(1976-),男,博士,副教授。